{"id":"CVE-2023-53084","state":"PUBLISHED","title":"drm/shmem-helper: Remove another errant put in error path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/shmem-helper: Remove another errant put in error path\n\ndrm_gem_shmem_mmap() doesn't own reference in error code path, resulting\nin the dma-buf shmem GEM object getting prematurely freed leading to a\nlater use-after-free.","publishedAt":"2025-05-02T15:55:32.319Z","updatedAt":"2026-10-15T21:41:25.853Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a","status":"affected","lessThan":"684c7372bbd6447c2e86a2a84e97a1478604d21f","versionType":"git"},{"version":"f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a","status":"affected","lessThan":"5cfb617967b05f8f27e862c97db1fabd8485f4db","versionType":"git"},{"version":"f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a","status":"affected","lessThan":"dede8c14a37a7ac458f9add56154a074ed78e7cf","versionType":"git"},{"version":"f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a","status":"affected","lessThan":"77d26c824aa5a7e0681ef1d5b75fe538d746addc","versionType":"git"},{"version":"f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a","status":"affected","lessThan":"ee9adb7a45516cfa536ca92253d7ae59d56db9e4","versionType":"git"},{"version":"4655afcf0e3874af03afff8c8704b52350bdba47","status":"affected","versionType":"git"},{"version":"5.9.5","status":"affected","lessThan":"5.10","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/drm_gem_shmem_helper.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.176","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.104","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.21","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2.8","status":"unaffected","lessThanOrEqual":"6.2.*","versionType":"semver"},{"version":"6.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/drm_gem_shmem_helper.c"]}],"references":["https://git.kernel.org/stable/c/684c7372bbd6447c2e86a2a84e97a1478604d21f","https://git.kernel.org/stable/c/5cfb617967b05f8f27e862c97db1fabd8485f4db","https://git.kernel.org/stable/c/dede8c14a37a7ac458f9add56154a074ed78e7cf","https://git.kernel.org/stable/c/77d26c824aa5a7e0681ef1d5b75fe538d746addc","https://git.kernel.org/stable/c/ee9adb7a45516cfa536ca92253d7ae59d56db9e4"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53084.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53084","state":"PUBLISHED","datePublished":"2025-05-02T15:55:32.319Z","dateUpdated":"2026-10-15T21:41:25.853Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-05-02T15:51:43.550Z"},"containers":{"cna":{"title":"drm/shmem-helper: Remove another errant put in error path","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/shmem-helper: Remove another errant put in error path\n\ndrm_gem_shmem_mmap() doesn't own reference in error code path, resulting\nin the dma-buf shmem GEM object getting prematurely freed leading to a\nlater use-after-free."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a","status":"affected","lessThan":"684c7372bbd6447c2e86a2a84e97a1478604d21f","versionType":"git"},{"version":"f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a","status":"affected","lessThan":"5cfb617967b05f8f27e862c97db1fabd8485f4db","versionType":"git"},{"version":"f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a","status":"affected","lessThan":"dede8c14a37a7ac458f9add56154a074ed78e7cf","versionType":"git"},{"version":"f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a","status":"affected","lessThan":"77d26c824aa5a7e0681ef1d5b75fe538d746addc","versionType":"git"},{"version":"f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a","status":"affected","lessThan":"ee9adb7a45516cfa536ca92253d7ae59d56db9e4","versionType":"git"},{"version":"4655afcf0e3874af03afff8c8704b52350bdba47","status":"affected","versionType":"git"},{"version":"5.9.5","status":"affected","lessThan":"5.10","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/drm_gem_shmem_helper.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.176","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.104","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.21","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2.8","status":"unaffected","lessThanOrEqual":"6.2.*","versionType":"semver"},{"version":"6.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/drm_gem_shmem_helper.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/684c7372bbd6447c2e86a2a84e97a1478604d21f"},{"url":"https://git.kernel.org/stable/c/5cfb617967b05f8f27e862c97db1fabd8485f4db"},{"url":"https://git.kernel.org/stable/c/dede8c14a37a7ac458f9add56154a074ed78e7cf"},{"url":"https://git.kernel.org/stable/c/77d26c824aa5a7e0681ef1d5b75fe538d746addc"},{"url":"https://git.kernel.org/stable/c/ee9adb7a45516cfa536ca92253d7ae59d56db9e4"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached via local DRM render-node ioctls (PRIME_FD_TO_HANDLE, driver MMAP_BO) and mmap(2) on the DRM device fd, not via network packet processing.\nAC:L - An attacker fully controls the trigger by importing a dma-buf and mmaping it such that dma_buf_mmap fails (e.g., MAP_PRIVATE against exporters like CMA heap/udmabuf that reject private mappings), causing a deterministic double-put with no uncontrolled race.\nPR:L - Render nodes (/dev/dri/renderD*) and PRIME/MMAP_BO ioctls are available to unprivileged users (DRM_RENDER_ALLOW), including Android apps and desktop users in the render/video group; no real root or CAP_SYS_ADMIN is required.\nUI:N - The attacker opens their own DRM render node, imports their own dma-buf, and mmaps it; no action by another user is required.\nS:U - This is a standard in-kernel use-after-free enabling local privilege escalation within the same OS security authority, with no VM/IOMMU/sandbox boundary crossed.\nC:H - The errant put frees the imported shmem GEM object while a handle still references it, yielding a classic use-after-free that can be leveraged for arbitrary kernel memory disclosure.\nI:H - Use-after-free of the GEM object enables heap reuse and corruption primitives suitable for arbitrary write and control-flow hijacking in the kernel.\nA:H - The premature free leads to kernel oops/panic on subsequent use of the dangling GEM object, so availability impact is high even without full exploitation."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T09:12:40.219Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.10.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.15.104"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.1.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9.5"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2023-53084","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-15T21:33:27.384820Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-15T21:41:25.853Z"}}]}}}